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(No Model.) 2 Sheets-'Shet 1.

H. E. PRIDMORE.

MACHINE FOR MAKING SAND MOLDS FOR CASTING. No. 435,520. Patented Sept. 2, 1890.

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H. E.'PRIDMORE. MACHINE FOR MAKING SAND MOLDS FOR GASTING.

No. 435,520. 7 Patented Sept. 2, 1890.

I IIIIIIEIIHHE Qwuafikoz .Heruy Efrdmore UNITED 1 STATES PATENT FFICE.

HENRY E. PRIDMORE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE MCCORMICK HARVESTING MACHINE COMPANY, OF SAME PLACE.

MACHINE FOR MAKING SAND [VIOLDS FOR CASTING.

SPECIFICATION forming part of Letters Patent No. 435,520,dated September 2, 1890. Application filed October 4, 1888. Serial No. 287,169. (No model.)

To a whom it may concern:

Be it known that I, HENRY E. PRIDMORE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Machines for Making Sand Molds for Casting, of which the following is a specification.

In the construction heretofore of green-sand molds by machinery, the cope or drag has been mounted upon a templet or partingboard having perforations of the outline of the patterns to be employed, and a plunger carrying such patterns has' been forced up from beneath to project the patterns through the perforations, the sand has then been rammed and the patterns withdrawn, when cope and parting-board can be removed ready for use in molding. Myimprovement relates to this type of molding-machines; and it consists in various combinations and details of construction hereinafter set forth. 4

In the drawings, Figure 1 is a side elevation of a machine constructed according torny invention, parts being broken away to more clearly expose the mechanism, and a cope or drag mounted thereon, but shown as'empty. Fig. 2 is a similar side elevation with the cope or drag mounted thereon and filled upon a pattern previously placed through the parting-board for the purpose of imparting the form or matrix to the sand. Fig. 3 is a top plan View of the machine with the cope or drag and parting-board partly broken away, and the frame also partly broken away, showing the plunger-head and pattern-plate beneath and the actuating-lever omitted. Fig. 4 is a like top plan view, the cope and parting-board being omitted, and the plungerframe, with its patterns, partly broken away; Fig. 5, an enlarged detail partly broken away and seen from above, showing the actuating devices for the plunger; and Fig. 6, a like enlarged detail'of said devices, but seen from the side beneath the machine.

A represents a strong iron casing, which may be of skeleton out-linethat is, formed with a number of upright posts united at their feet by abase-ring a which, except at certain points where it outsets from the main body for the passage or reception of other parts, is rabbeted along its under edge to fit into a converse rabbet a upon the rounded edges of a supporting-plate or frame-plate A, that is mounted upon and secured to suitablelegs B, the whole, together with an overhead annular seat C for the reception of the partingboard D of the mold, and which seat also forms the upper binding-ring of the casing, constituting the machine-frame. V The frame is further provided with vertical guides E for a plunger-head F, which guides, in the present instance, take the form of bolts, uniting the annular seat for the parting-plate to the frame-plate, and therefore binding the whole 6 frame firmly together.

The plunger-head carries a pattern-plate F, which, although not neeessarilyseparatetherefrom, is preferably so, in order to accommodate various exigencies of the machine-such as the introduction of long cores or the substitution of other patterns for use with a parting-board having corresponding perforations-and is therefore shown as rabbeted and set into the rabbeted rim of the head, whereby it is 'rendered removable and interchangeable. It atfords a seat or rest for the patterns F which may be firmly secured to it whenever necessary, and in its upward movement with the plunger it reaches into close proximity with the under side of the parting-board seat.

Between the legs of the machine-frame, in a suitable bearing G, formed upon a bracket or hanger H, is mounted a short horizontal rock-shaft I, bearing at its outer end a lever K and at its inner end a short crank it, which, by means of the link K, is connected with a pin it at the lower end of a vertically-sliding rod L, playing in a sleeve L at the foot of said hanger, this rod being at its upper end connected with a yoke M, depending from the plunger-plate, the vertical arms of which pass parallel straight sides or of the frame-plate and through outsetting loops m in the base ring of the casing. Thus by rocking the lever 5 the plunger-plate will be carried up or down, the downward limit of its movement being checked, however, in the descent by an ad- 3' ustable collar N on the vertically-slidin g rod, so that the patterns need never be fully withdrawn from the openings in the parting-board unless so desired.

For the ready assembling and dismantling of the frame, besides the structural features already mentioned, which are mainly to that end, the base-ring of the casing is provided with two outsetting loops n, in addition to the two before mentioned, which admit the passage of the guide-ears n of the plunger-head, sothat by removing nuts 11 which hold the guide-rods, the entire casing, together with said rods, may be drawn ofi of the plunger and frame-plate and the latter, after one or more legs are detached, withdrawn endwise from the yoke, the remaining parts, as obvious from the drawings, being readily separable by unscrewing a few nuts and withdrawing two or more pins.

The pattern or patterns carried on top of the plunger-plate or pattern-plate pass through closely-fitting openings 0 in the parting-board of their own peripheral outline, and normally are at the extreme of their upward movement projecting beyond its upper surface sufficiently for their purpose-that is, as if ordinary patterns resting on said surface-in which projected position they are in readiness for the sand 0 to be rammed. P is the cope or drag, whichever it may be, mounted on said parting-board and positioned thereon by means of the usualdowel pin or pinsp, rising from an ontsetting ear of said board.

In practice two machines are used for each fiaskone for the cope and one for the dragand in operation the cope, or it may be the drag, is placed upon the parting-board and the patterns are projected therethrough by lifting the lever. Parting-sand is then dusted in, green sand filled in on top of that, and the whole rammed through the top of the cope or the bottom of the drag, if it happens to be the latter. Next the sand is leveled or struck ofi at the'top, the lever is depressed, carrying the patterns down through the parting-board, withdrawing them from the mold, which still rest-s upon said board, and therefore is relieved from the liability-to breaking and injury, so frequent when it is directly lifted from the patterns, especially when the latter have slight draw. The patterns having been withdrawn, the cope or drag is removed, inverted, any necessary cores inserted, and facing-powder applied, when cope and drag can be put together to form a flask ready for casting; but I do not intend herein to limit myself to the specific form of mechanism, so far as the generic features of my invention are concerned, nor to any specific outline of machine -frame, cope, or drag, parting-board, pattern-plate, orpatterns having cast gear-wheels of all kinds and articles of various outlines by means of my improved machine, being able to change patterns at will, in connection with a suitable parting-board, and considering that the desired outline of model or flask will determine many or all of these features; but

What I do claim, and desire to secure by Letters Patent, is-- 1. The combination, substantially as here: inbefore set forth, with the removable parting-board, of the plunger having a rabbeted seat at its head and the removable patternplate fitted to said seat.

2. The combination, substantially as here inbefore set forth, with the casing and its base-ring and the plunger and its yoke, of the frame-plate A, rounded through a portion of its peripheryto support said casing, and flattened along the sides where the plunger. yoke passes, whereby the parts may be readily assembled and dismantled.

3. The combination, substantially as hereinbefore set forth, with the plunger, its guides, and the cars which engage with said guides, of the frame-casing having its base-ring outset around said ears, that the plunger may be withdrawn therethrough.

4. The combination, substantially as hereinbefore set forth, of the frame-plate, the easing having a base-ring encircling said frameplate and carrying at its top an annular seat for the parting-plate, the plunger, and the bolts uniting the frame-plate with the annular seat and serving at once to bind the casing to the frame-plate and to guide the plunger in its reciprocations.

HENRY E. PRIDMORE. WVitnesses:

ALICE S. WELLS, LEONARD VASSALL. 

